I’ve flown a number of drones and the best drone I’ve flown that clocks in under £100 is a tiny-whoop and they’re absolutely not fit for combat lol.
Tiny-whoop more reffers to a class of FPVs rather than any specific drone. They’re small enough to be flown around indoors and typically weigh in at under 25g TOM. I guess you could use one for surveillance or scoping out a building in the field but defo not for combat lol